Pues eso:
Mi portatil es un LGA505, grafica NVIDIA GT425M.
4gb de ram
procesador un i5.
He probado todo tipo de cosas:
-Drivers libres, y privativos. Nouveau, oficiales de nvidia... todo tipo de drivers
-Cargarme los drivers integrados, y, instalar los oficiales de nvidia desde linea de comandos porque no tenia drivers
-Editar xorg.conf añadiendo Option “RegistryDwords” “EnableBrightnessControl=1″
-Instalando un kernel que encontre por google que decian que arreglaba el problema
He probado infinidad de distribuciones de linux, con todas estas alternativas:
-Debian
-Ubuntu (versiones antiguas y mas nuevas)
-OpenSuse
-Arch
-Mint
El brillo no me cambia ni con la combinacion de teclas FN+Arriba/FN+Abajo, de hecho no baja ni sube, la barra sale siempre con el brillo al maximo. Cambiar el brillo con comandos del terminal no funciona tampoco.
Adjunto un lspci
victor@victor-laptop:~$ lspci
00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02)
00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev 02)
00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)
00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05)
00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 05)
00:1c.4 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 5 (rev 05)
00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5)
00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05)
00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 05)
01:00.0 VGA compatible controller: nVidia Corporation Device 0df0 (rev a1)
01:00.1 Audio device: nVidia Corporation Device 0bea (rev a1)
02:00.0 Network controller: RaLink RT3090 Wireless 802.11n 1T/1R PCIe
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)
ff:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02)
ff:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02)
ff:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02)
ff:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02)
ff:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
ff:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
victor@victor-laptop:~$
Llevo peleandome con esto desde hace 2 años que me compre el portatil.